Network coding based on opportunistic routing in streaming media wireless mesh networks
Qinghua Li · Journal of Central South University(Science and Technology) · 2012
Using a deterministic network calculus tool,the wireless mesh network nodes' backlog upper bound,the end-to-end upper delay bound and the end-to-end upper delay jitter bound were derived,based on the existing link throughput model of opportunistic routing;and then a deterministic network coding(DNC) which meets the QoS of streaming media was designed.An expect transmission coding(ETC) considering the node's backlog upper bound was proposed to a guide line which determines the coding nodes.In order to improve the performance,the encode nodes using network coding before the node's backlog upper bound was exceeded.The represented expect transmission performance(ETP) considering the jitter and the end-to-end upper delay jitter bound was a guide line which determines the received candidate nodes.The data packets were encoded among the candidate nodes by the max ETC.Comprehensive simulations and results show that the throughput is improved,and the delay time and jitter of end to end are degraded.